137 lines
3.7 KiB
JavaScript
137 lines
3.7 KiB
JavaScript
var assert = require('assert');
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var hpack = require('../');
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var fixtures = require('./fixtures');
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describe('hpack/compressor', function() {
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var comp;
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beforeEach(function() {
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comp = hpack.compressor.create({
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table: {
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maxSize: 1024
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}
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});
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});
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function expect(arr, enc) {
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function isNumber(num) {
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return typeof num === 'number';
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}
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var out = comp.read().toString('hex');
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if (Array.isArray(arr) && !arr.every(isNumber)) {
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arr = arr.map(function(item) {
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return new Buffer(item, enc);
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});
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arr = Buffer.concat(arr);
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} else {
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arr = new Buffer(arr, enc);
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}
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var actual = arr.toString('hex');
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assert.equal(out, actual);
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}
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describe('indexed field', function() {
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it('should lookup entry from static table', function() {
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comp.write([{ name: ':method', value: 'GET' }]);
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expect([ 0b10000000 | 2 ]);
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});
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it('should fetch entry from the end of the static table', function() {
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comp.write([{ name: 'www-authenticate', value: '' }]);
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expect([ 0b10000000 | 61 ]);
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});
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});
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describe('literal field', function() {
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it('should lookup name in the table (incremental)', function() {
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comp.write([{ name: 'host', value: 'localhost' }]);
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expect('6686a0e41d139d09', 'hex');
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comp.write([{ name: 'host', value: 'localhost' }]);
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expect([ 0b10000000 | 62 ]);
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});
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it('should lookup name in the table (not-incremental)', function() {
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comp.write([{ name: 'host', value: 'localhost', incremental: false }]);
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expect('0f1786a0e41d139d09', 'hex');
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// Should not use the table
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comp.write([{ name: 'host', value: 'localhost' }]);
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expect('6686a0e41d139d09', 'hex');
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});
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it('should evict header field from the table', function() {
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for (var i = 0; i < 1000; i++) {
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comp.write([{ name: 'host', value: 'localhost' + i }]);
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comp.read();
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}
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assert(comp._table.size < comp._table.maxSize);
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assert.equal(comp._table.dynamic.length, 21);
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});
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});
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describe('update size', function() {
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it('should evict header field from the table', function() {
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comp.write([{ name: 'host', value: 'localhost' }]);
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expect('6686a0e41d139d09', 'hex');
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comp.reset();
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// update=0, update=maxSize
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expect('203fe107', 'hex');
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comp.write([{ name: 'host', value: 'localhost' }]);
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expect('6686a0e41d139d09', 'hex');
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});
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it('should send dynamic update if size >= protocolMaxSize', function() {
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comp.updateTableSize(Infinity);
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// update=maxSize
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expect('3fe107', 'hex');
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});
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});
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describe('spec examples', function() {
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beforeEach(function() {
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comp = hpack.compressor.create({
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table: {
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maxSize: 256
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}
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});
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});
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var tests = fixtures.specExamples;
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tests.forEach(function(test, i) {
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var prev = tests[i - 1];
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it('should give expected output on ' + test.id, function() {
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var startFrom = test.continuation ? prev.comp : comp;
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if (!startFrom)
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throw new Error('Previous test failed');
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comp = startFrom;
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comp.write(test.output.map(function(pair) {
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return { name: pair[0], value: pair[1], huffman: test.huffman };
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}));
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expect(test.input.replace(/ /g, ''), 'hex');
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// Verify table contents
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assert.deepEqual(comp._table.dynamic.map(function(header) {
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return [ header.name, header.value, header.totalSize ];
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}).reverse(), test.table);
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// Verify table size
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var expectedSize = test.table.reduce(function(acc, item) {
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return acc + item[2];
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}, 0);
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assert.equal(comp._table.size, expectedSize);
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test.comp = comp;
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});
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});
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});
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});
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